Joist-bar spacer



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" .TOISTLBAR SPACER.

specification of Leners Patent. Patented Jan, 13, 1921 Application nea December 3,1915. saranno. 342,069;

floor work rowsof tile areplaced end to end leaving a space between certain of the rows. These spaces are filled with concrete containinv suitable reinforcing bars. 1 The tile on the4 opposite vertical sides and the form on the bottom or third side comprise the walls constitutingthe mold for the joist.

My invention 'relates to means for posh tioning and securely holding the` reinforcing bars prior to and during the'upouring of the concrete.

A supporting and spacing device designed to meet these conditions must first provide a supporting feature to keep the rod or rods at the required distance from1v the form surface. This supporting element must in itself be elevated above the form in a manner 3ermitting the free flow of concrete beneat it. A second requirement is that a feature be included to correctly position the supporting member in relation to the long axis of the joist and preserve this position prior to and during the concreting operation. In addition a feature is required to permit the ready fastening of the rods in the proper place on the supporting member.

The device I have invented to meet these requirements is unique in that I make use of the fact that, as the tile rows are formed, blocks in consecutive rows take such rela tive position as to bring the open joints between adjoining tile substantially opposite, in relation to the space between tile rows. Inasmuch as these joints or open spaces are from l to i of an inch in width, and inasmuch as the weight of the tile blocks is sufficient to cause them to remain substantially in place as at first arranged, I provide as a means of support and alinement fiat projections or wings formed integral with a supporting chair member and so` dieposedin relation `to the chair member that when incorrect position, these wing members fit in between the tile blocks on both sides of the space and effectively prevent displacement.

The invention will be more readily understood by reference to the accompanying drawing, wherein, j

F'gure l is a perspective view showing the application of my invention to a` typical floor construction. l i

Fig. Q is an enlarged plan view of the spacer, and

Fig. 3 is an elevation showing the means employed for securing a` plurality orurein forcing bars on the spacer.`

In the drawings fioor tile areindicated at 1, 2, al space 3, `remaining at the ends of adjacent tile, according to the usual prac' tice. My improved spacer comprisesa, me tallic strip of relatively light sheet metal having ends in the form of wings 4, ,and` a lateralfiange, 5,.of alength substantially equal` to the space providedbetween the rows of tile. The flange 5 is provided with spaced elongated apertures 6, and the vertical web 7 of the spacer is cut away at its lower edge to provide an open space into which the concrete may be received as required inthe use of devices of this sort.

A.s a fastening device for the reinforcing bars indicated at 1.0, I prefer to provide spring wire clips composed of a bent portion 8, and re-bent points 9. These will be easily formed in a shape substantially the same as that shown in Fig. 3. In application they may be sprung over the bar and snapped into the position shown, the bent ends 9, being deflected to permit the points to pass throughthe elongated openings 6.

i Another important feature of my fastening means is that I do not require any tight hold on the bar preventing free movement of the bar in the direction of itslength. This allows ready adjustments in the position of the bar with reference to its length. I do effectively prevent its movement sidewise or vertically in relation to my chair. I thus solve by extremely simple means all the requirements of the problem. I produce an article of marked economy as to material, simplicity of manufacture and of a form very favorable for handling in large quantities, calculated to retain its first shape throughoutall stages of handling in bulk. My manufacturing problem is simplified due to the simple nature of the dies required.

My labor problem is reduced to the extent that the placing of the fasteningmeans requires neither strength nor skill.V

A notable feature of my spacing device is in that it serves to locate and hold the bars against vertical andV lateral movement and, so far as the spacing bar is concerned, is entirely embedded within the concrete; This result is secured by cutting at the web 7, the Wings 4 having a bearingron the form beneath the tiles; The requisite strength, notwithstanding the cutting away ot' the'web, is secured by forming the spacer otangular shape atthat point.

I claim z l. A joist bar spacer comprising` in combinatiom a strip of metal bent to provide Hat ends Vadapted t lbe accommodated in the spaces between the abutting ends oi adjacent tiles, and' an intermediate portion having, a vertical and a horizontal web, the horizontal VWeb being apertured, and fastening clips having means adapted to coperate with said .apertures to secure a reinforcing-bar to the spacer, substantially as described.

2. A joist barspaccr comprising` in combination, a Vstrip of metal bent to provide Hat ends adapted? Yto be acconnnodated in the space between' the abutting'ends o'l' adjacent tiles andan intermediate portion having a vertical anda horizontal' web, said Web being of lessheigh't than said end portions, the

horizontal web being' provided with elongated spaced apertures, and a spring fastening device having means adapted to coperate with said apertures to secure a reinforcing bar, substantially as described.

A spacing device for concrete reinforcement comprising in combination, a strip o t metal bent to provide tlat verticallyY extend in;` iving's at its ends and a horizontal inter` mediate portion, said portion being apertured, and a fastening device havin;v meansl adapted to cooperate with the apertures in said horizontal portion in order to secure a Witness: H. L. Dow.

apertured, and fastening i 

